using System;

public class Student
{
    private string _id;
    private string _name;
    private double _score;

    public Student(string id, string name, double score)
    {
        _id = id;
        _name = name;
        _score = score;
    }

    public string Id
    {
        get { return _id; }
        set { _id = value; }
    }

    public string Name
    {
        get { return _name; }
        set { _name = value; }
    }

    public double Score
    {
        get { return _score; }
        set { _score = value; }
    }

    public void ShowInfo()
    {
        Console.WriteLine($"学生信息 - 学号：{_id}，姓名：{_name}，成绩：{_score}");
    }
}

public class StudentDemo
{
    public static void Run()
    {
        Student stu = new Student("001", "张三", 85.5);
        stu.ShowInfo();

        stu.Score = 90.0;
        stu.ShowInfo();

        Console.WriteLine("按回车键返回菜单...");
        Console.ReadLine();
    }
}